JP7370081B2 - Single leg stand type training wheel unit and bicycle - Google Patents

Description

The present invention relates to a one-leg stand type auxiliary wheel unit and a bicycle.

A bicycle auxiliary wheel is attached to the body of the bicycle on the side of the rear wheel of the bicycle. Usually, this auxiliary wheel is attached to a bicycle by being attached to one end of a rod-shaped arm, and the other end of this arm is fixed to the end of the axle of the rear wheel of the bicycle by tightening a bolt. This training wheel is used to learn the technique of riding a bicycle, and whether to use it or not is selected depending on the stage of learning the technique.

As described above, according to the configuration in which the auxiliary wheel is attached to the axle via the arm, when it is desired to stop using the auxiliary wheel, it is necessary to remove the auxiliary wheel and the arm from the bicycle. Therefore, according to this configuration, since it is not easy to attach and detach the auxiliary wheel, it is difficult to know when to stop using the auxiliary wheel. In addition, in practice, there are cases where it is desirable to put on the training wheels again after once discontinuing the use of the training wheels. You may hesitate. As a result, it may take longer for the user to be able to ride a bicycle, and there is an increased risk of falling accidents during practice.

From this point of view, by configuring the arm to be able to swing between an upright position and a flip-up position relative to the bracket attached to the bicycle body, assistance can be provided without removing the bracket from the bicycle body. A configuration has been proposed in which use or non-use of a ring can be selected (see Japanese Patent Laid-Open No. 2003-19987).

Japanese Patent Application Publication No. 2003-19987

The auxiliary wheel structure described in the above-mentioned publication moves the arm to an upright position and then fixes the arm in the upright position by engaging a locking piece with a bracket portion. However, users of the auxiliary wheels are often young and may forget to reliably engage the locking pieces with the bracket portions. In this case, with the above-mentioned auxiliary wheel structure, there is a risk that the arm may unintentionally move to a raised position while the bicycle is running, leading to a fall accident or the like.

The present invention was made based on the above circumstances, and an object of the present invention is to provide a one-leg stand type training wheel unit and a bicycle that allow users to easily and reliably select whether to use training wheels or not. do.

A one-leg stand type auxiliary wheel unit according to one aspect of the present invention includes a mounting portion that can be attached to the body of the bicycle on the side of the rear wheel of the bicycle, and a mounting portion that is rotatably connected to the mounting portion on one end side, and is capable of standing upright. a leg part that is swingable between a flip-up position and a flip-up position; a lock part that is rotatably connected to the leg part and that is engaged with the mounting part when the leg part is in the upright position; a spring member connected to the mounting part and the locking part and biasing the mounting part and the locking part in opposite directions so that the rocking direction of the locking part changes between the upright position and the flip-up position; and an auxiliary wheel attached to the other end side of the leg, and the lock part is provided with a pushing piece having a pushing surface disposed horizontally while being engaged with the mounting part. Then, with the leg section in the upright position, by pushing the push-in surface downward and moving the locking section rearward, the leg section is swung to the flip-up position.

A bicycle according to another aspect of the present invention includes the one-leg stand type auxiliary wheel unit.

In the one-leg stand type training wheel unit according to one aspect of the present invention and the bicycle according to another aspect of the present invention, use or non-use of the training wheel can be easily and reliably selected.

FIG. 1 is a schematic side view showing a one-leg stand type auxiliary wheel unit according to an embodiment of the present invention in an upright position attached to a bicycle. FIG. 2 is a schematic side view showing the one-leg stand type auxiliary wheel unit of FIG. 1 in a flip-up position attached to a bicycle. FIG. 3 is a schematic front view of the one-leg stand type auxiliary wheel unit of FIG. 1 in an upright position. FIG. 4 is a sectional view taken along line IV-IV of the one-leg stand type training wheel unit shown in FIG. FIG. 5 is a schematic diagram showing a procedure for swinging the one-leg stand type auxiliary wheel unit of FIG. 1 from a standing position to a flip-up position.

[Description of embodiments of the present invention]
First, embodiments of the present invention will be listed and explained.

A one-leg stand type auxiliary wheel unit according to one aspect of the present invention includes a mounting portion that can be attached to the body of the bicycle on the side of the rear wheel of the bicycle, and a mounting portion that is rotatably connected to the mounting portion on one end side, and is capable of standing upright. a leg part that is swingable between a flip-up position and a flip-up position; a lock part that is rotatably connected to the leg part and that is engaged with the mounting part when the leg part is in the upright position; a spring member connected to the mounting part and the locking part and biasing the mounting part and the locking part in opposite directions so that the rocking direction of the locking part changes between the upright position and the flip-up position; and an auxiliary wheel attached to the other end side of the leg, and the lock part is provided with a pushing piece having a pushing surface disposed horizontally while being engaged with the mounting part. Then, with the leg section in the upright position, by pushing the push-in surface downward and moving the locking section rearward, the leg section is swung to the flip-up position.

In the one-leg stand type auxiliary wheel unit, the spring member moves the mounting portion and the locking portion in opposite directions so that the rocking direction of the locking portion changes between the upright position and the flip-up position. Since the locking portion is biased, the locking portion can be automatically engaged with the mounting portion by moving the leg portion to the upright position. Further, in the one-leg stand type auxiliary wheel unit, the lock portion is provided with a push piece having a push surface arranged horizontally while being engaged with the mounting portion, and the leg portion is In the upright position, by pushing the pushing surface downward and moving the lock part backward, the leg part is swung to the flip-up position, so that the leg part can unintentionally Swinging to the flip-up position can be suppressed. Therefore, with the one-leg stand type training wheel unit, it is possible to easily and reliably select whether or not to use the training wheel.

The lock part has a main body connected to the leg part, an engaging part that is engaged with the mounting part is provided at the upper end of the main body, and an engaging part that is engaged with the mounting part is provided at the lower end of the main body. It is preferable that a connecting portion connected to the member is provided, and the pushing piece protrudes forward from the lower end side of the main body. In this way, the locking part has a main body connected to the leg part, an engaging part that is engaged with the mounting part is provided at the upper end of the main body, and a lower end of the main body is provided with a connecting portion connected to the spring member, and the push-in piece protrudes forward from the lower end side of the main body, so that when the leg portion is in the upright position, the push-in surface By pushing downward and moving the lock part backward, the leg part can be easily swung to the flip-up position.

It is preferable that the pushing piece has a flat plate shape. As described above, since the pushing piece has a flat plate shape, it is easy to push the pushing surface downward and move the lock part rearward when the leg part is in the upright position.

The leg portion is provided continuously from a linear first portion connected to the mounting portion and the first portion, and is configured so that the leg portion does not interfere with the locking portion when the leg portion swings. It is preferable to have a second portion that is curved in a character shape, and a third portion that is provided continuously from the second portion and to which the auxiliary wheel is attached. In this way, the leg portion is provided continuously from the linear first portion connected to the mounting portion and the first portion, and when the leg portion swings, it interferes with the lock portion. By having a second portion curved in a U-shape to prevent the pushing surface from moving, and a third portion provided continuously from the second portion and to which the auxiliary wheel is attached, the pushing operation of the pushing surface is prevented. etc. can be easily performed.

A bicycle according to another aspect of the present invention includes the one-leg stand type auxiliary wheel unit.

Since the bicycle is equipped with the one-leg stand type training wheel unit, it is possible to easily and reliably select whether to use the training wheel or not.

In addition, in the present invention, "front" means the front in the straight-ahead direction of the bicycle, and "rear" means the opposite side. "Laterally" means the left and right direction with respect to the straight-ahead direction.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

<Single leg stand type training wheel unit>
The one-leg stand type training wheel unit 10 (hereinafter also simply referred to as "training wheel unit 10") shown in FIGS. 1 to 4 is configured to be attachable to the body 20a of the bicycle 20 on the side of the rear wheel of the bicycle 20. ing. The auxiliary wheel unit 10 has an attachment part 1 that can be attached to a body 20a of a bicycle 20, and is rotatably connected to the attachment part 1 at one end, and can be moved between an upright position in FIG. 1 and a flip-up position in FIG. A swingable leg part 2; a lock part 3 rotatably connected to the leg part 2 and engaged with the mounting part 1 when the leg part 2 is in the upright position; A spring member 4 that is connected to the mounting part 1 and the lock part 3 in opposite directions so that the rocking direction of the lock part 3 changes between the upright position and the flip-up position; It is provided with an auxiliary wheel 5 attached to the other end side. The locking portion 3 is provided with a push-in piece 12 having a push-in surface 12a that is disposed in the horizontal direction when engaged with the attachment portion 1 (that is, when the leg portion 2 is in the upright position). As shown in FIG. 5, in the training wheel unit 10, when the leg portion 2 is in the upright position, the pushing surface 12a is pushed downward and the lock portion 3 is moved rearward, so that the leg portion 2 is It is configured to be swung into the flip-up position. That is, the auxiliary wheel unit 10 differs in the swinging procedure of the leg from a single-leg stand in which the leg is swung to the flip-up position simply by kicking the lock part backward.

In addition, in FIGS. 1 to 4, the auxiliary wheel unit 10 is attached to the vehicle body 20a on the left side of the bicycle 20. However, the auxiliary wheel unit may be attached to the vehicle body 20a on the right side of the bicycle 20, or may be attached to the vehicle body 20a on both left and right sides of the bicycle 20. When the auxiliary wheel unit is attached to the vehicle body 20a on the right side of the bicycle 20, this auxiliary wheel unit is attached to the auxiliary wheel unit shown in FIGS. The configuration can be symmetrical to that of the wheel unit 10.

(Mounting part)
The attachment portion 1 is fixed to the frame of the bicycle 20, for example, near the axle of the rear wheel of the bicycle 20. As shown in FIGS. 3 and 4, the mounting portion 1 has a locking hole 1a that is engaged with an engaging portion 11b of a locking portion 3, which will be described later, when the leg portion 2 is in the upright position.

(Lock part)
As shown in FIGS. 3 and 4, the lock part 3 has a main body 11 connected to the leg part 2. As shown in FIGS. That is, the lock part 3 has a main body 11 connected to the leg part 2 and the above-mentioned pushing piece 12 connected to the main body 11.

As shown in FIG. 4, the main body 11 has a rotation shaft 11a rotatably connected to the leg portion 2. As shown in FIG. The rotating shaft 11a extends in a direction parallel to the swing axis of the leg portion 2. The above-mentioned engaging portion 11b that is engaged with the mounting portion 1 is provided at the upper end of the main body 11. Furthermore, a connecting portion 11c connected to the spring member 4 is provided at the lower end of the main body 11. As shown in FIG. 3, the main body 11 guides the legs 2 to the flip-up position when the pushing surface 12a is pushed in and the locking part 3 is moved rearward with the legs 2 in the upright position. It has an abutting part 11d that abuts against the leg part 2 so as to make the leg part 2 move.

The engaging portion 11b is, for example, a hook projecting toward the upper end of the main body 11. The engaging portion 11b is configured to be automatically inserted into the locking hole 1a when the leg portion 2 moves to the upright position. More specifically, when the leg portion 2 swings from the flip-up position to the standing position, the lock portion 3 is urged to swing forward by the spring member 4. As a result, the engaging portion 11b is automatically inserted into the locking hole 1a.

The connecting portion 11c is, for example, a hook provided on the outer surface of the main body 11 (the surface located on the outer side when attached to the bicycle 20).

The push-in piece 12 is provided so that it can be pushed downward with, for example, a user's foot. The pushing piece 12 is connected to the lower end of the main body 11. The pushing piece 12 projects forward from the main body 11. Further, the pushing piece 12 protrudes outward from the outer surface of the main body 11. Note that the pushing piece 12 is “connected to the lower end of the main body” when the pushing piece 12 is connected to a portion of the main body 11 lower than the rotating shaft 11a when the leg portion 2 is in the upright position. This means that the vertical distance between the rotating shaft 11a of the main body 11 and the pushing surface 12a is longer than the vertical distance between the pushing surface 12a and the lower end of the main body 11. .

The auxiliary wheel unit 10 includes an engaging portion 11b that is engaged with the mounting portion 1 at the upper end of the main body 11, and a connecting portion 11c that is connected to the spring member 4 at the lower end of the main body 11. By protruding forward from the lower end side of the main body 11, the pushing piece 12 pushes the pushing surface 12a downward and moves the locking part 3 backward when the leg part 2 is in the upright position. This allows the leg portion 2 to be easily swung to the above-mentioned flip-up position.

The pushing surface 12a constitutes the upper surface of the pushing piece 12. As described above, the pushing surface 12a is arranged horizontally with the leg portion 2 in the upright position. Here, when the pushing surface is "arranged in the horizontal direction", when the training wheel unit is attached to a bicycle and the bicycle is standing upright with respect to the horizontal surface, the angle between the pushing surface and the horizontal surface is This means that the angle is 10° or less. Moreover, it is preferable that the above-mentioned angle is 5° or less.

It is preferable that the pushing piece 12 has a flat plate shape. According to this configuration, when the leg portion 2 is in the upright position, it is easy to push the pushing surface 12a downward and move the lock portion 3 rearward. The pushing piece 12 may be connected to the main body 11 by, for example, welding, or may be connected to the main body 11 using a screw or the like.

The area of the pushing surface 12a is not particularly limited as long as it can be pushed in with a foot, but may be, for example, 2.5 cm ² or more and 8 cm ² or less.

[Steps for swinging the legs]
Referring to FIG. 5, a procedure for swinging the leg portion 2 from the standing position to the flip-up position will be described. When swinging the leg portion 2 from the standing position to the flip-up position, the user first pushes the push-in surface 12a downward with his/her foot or the like (see A1 in FIG. 5). As a result, the locking portion 3 rotates around the rotating shaft 11a, and the engaging portion 11b slips out from the locking hole 1a. Next, in this state, the user kicks up the lock part 3 rearward with his/her foot or the like (see A2 in FIG. 5). As a result, the contact portion 11d of the lock portion 3 contacts the leg portion 2, and the leg portion 2 is pressed by the lock portion 3, thereby causing the leg portion 2 to swing rearward. When the leg portion 2 swings to the flip-up position, the spring member 4 biases the lock portion 3 so that the leg portion 2 is maintained at the flip-up position.

(leg)
The leg portion 2 is, for example, rod-shaped. As shown in FIG. 3, the leg part 2 is provided with a linear first part 2a connected to the mounting part 1 and a continuous part from the first part 2a, and is locked when the leg part 2 swings. It has a second part 2b that is curved in a U-shape so as not to interfere with the part 3, and a third part 2c that is provided continuously from the second part 2b and to which the auxiliary wheel 5 is attached. The leg portion 2 has a first portion 2a, a second portion 2b, and a third portion 2c in this order from the side connected to the attachment portion 1 to the side to which the auxiliary wheel 5 is attached.

The first portion 2a is configured to extend in the vertical direction when the leg portion 2 is in the upright position. A rotating shaft 13 that is swingably connected to the mounting portion 1 is provided at the upper end of the first portion 2a.

The second portion 2b is curved laterally in a U-shape from the end on the first portion 2a side. Note that the "U-shape" includes an angular U-shape and a shape similar to an angular U-shape.

The third portion 2c extends linearly laterally from the end on the second portion 2b side.

In the training wheel unit 10, the leg portion 2 is provided continuously from a linear first portion 2a connected to the mounting portion 1 and the first portion 2a, and locks when the leg portion 2 swings. By having the second part 2b which is curved in a U-shape so as not to interfere with the part 3, and the third part 2c which is provided continuously from the second part 2b and to which the auxiliary wheel 5 is attached, The pushing operation of the pushing surface 12a, etc. can be easily performed.

(Spring member)
As described above, the spring member 4 biases the attachment portion 1 and the lock portion 3 in opposing directions. The spring member 4 urges the lock portion 3 to swing forward when the leg portion 2 is in the upright position. Moreover, the spring member 4 urges the lock part 3 to swing rearward as the lock part 3 is moved rearward.

<Bicycle>
The bicycle 20 includes the auxiliary wheel unit. The bicycle 20 may be provided with the auxiliary wheel unit only on one side of the rear wheel, or may be provided with the auxiliary wheel unit on both left and right sides of the rear wheel.

<Advantages>
In the auxiliary wheel unit 10, the spring member 4 biases the mounting portion 1 and the lock portion 3 in opposite directions so that the rocking direction of the lock portion 3 changes between the upright position and the flip-up position. Therefore, by moving the leg portion 2 to the upright position, the lock portion 3 can be automatically engaged with the attachment portion 1. Furthermore, when the training wheel unit 10 swings the leg portion 2 from the upright position to the flip-up position, it requires movement in two directions: pushing in the pushing surface 12a and moving the locking portion 3. It is possible to prevent the leg portion 2 from unintentionally swinging to the flip-up position. Therefore, the training wheel unit 10 can easily and reliably select whether to use the training wheels 5 or not.

Since the bicycle 20 includes the auxiliary wheel unit 10, it is possible to easily and reliably select whether to use the auxiliary wheel 5 or not.

[Other embodiments]
The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is not limited to the configuration of the above-described embodiments, but is indicated by the claims, and is intended to include all changes within the meaning and scope equivalent to the claims. Ru.

The specific shape of the lock portion is not limited to the configuration described in the embodiment above. For example, the pushing piece may be provided so as to protrude laterally from the outer surface of the main body. However, when the auxiliary wheel unit swings the leg from the standing position to the flip-up position, the pushing surface is pushed in and the locking part is moved backward, so the series of operations is not easy. It is preferable that the pushing piece protrudes forward of the main body from the viewpoint of being able to perform the pushing.

The shape of the pushing piece is not limited to a flat plate shape. However, from the viewpoint of more easily avoiding interference between the pushing piece and the leg portion when the pushing surface is pushed, etc., it is preferable that the pushing piece has a flat plate shape.

The leg portion does not need to have the first portion, second portion, and third portion as long as interference with the lock portion and the like can be prevented.

As described above, the one-leg stand type training wheel unit according to one aspect of the present invention is suitable for bicycle training because it is possible to easily and reliably select whether or not to use the training wheel.

1 Attachment part 1a Locking hole 2 Leg part 2a First part 2b Second part 2c Third part 3 Lock part 4 Spring member 5 Training wheel 10 Single leg stand type training wheel unit (training wheel unit)
11 Main body 11a Rotating shaft 11b Engaging portion 11c Connecting portion 11d Contact portion 12 Pushing piece 12a Pushing surface 13 Rotating shaft 20 Bicycle 20a Vehicle body

Claims (4)

an attachment part that can be attached to the body of the bicycle on the side of the rear wheel of the bicycle;
a leg rotatably connected to the mounting portion at one end and swingable between a standing position and a flip-up position;
a locking portion rotatably connected to the leg and engaged with the mounting portion when the leg is in an upright position;
A spring that is connected to the mounting portion and the locking portion and urges the mounting portion and the locking portion in opposite directions so that the rocking direction of the locking portion changes between the upright position and the flip-up position. parts and
and an auxiliary wheel attached to the other end of the leg,
The lock part is provided with a push piece having a push surface arranged horizontally while being engaged with the mounting part,
The leg portion is provided continuously from a linear first portion connected to the mounting portion and the first portion, and is configured so that the leg portion does not interfere with the locking portion when the leg portion swings. It has a second part that is curved in a character shape, and a third part that is provided continuously from the second part and to which the auxiliary wheel is attached,
One-legged stand-type auxiliary wheel in which the leg is swung to the flip-up position by pushing the push-in surface downward and moving the locking part rearward while the leg is in the upright position. unit. The lock part has a main body connected to the leg part,
An engaging portion that is engaged with the mounting portion is provided at the upper end of the main body, and a connecting portion that is connected to the spring member is provided at the lower end of the main body.
The one-leg stand type auxiliary wheel unit according to claim 1 , wherein the pushing piece protrudes forward from the lower end side of the main body. The one-leg stand type auxiliary wheel unit according to claim 1 or 2, wherein the push-in piece has a flat plate shape. A bicycle comprising the one-leg stand type auxiliary wheel unit according to any one of claims 1 to 3 .

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